Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Ögmundur Vidar Rúnarsson"'
Publikováno v:
European Journal of Organic Chemistry. 2012:7015-7041
In 2012 we celebrate the 125th anniversary of the unique molecule Troger's base (TB), first synthesized by Julius Troger in 1887. Being a V-shaped C2-symmetric chiral molecule, it possesses many interesting features. The TB field was reopened in 1985
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96a3091737aaf99b625077fa077498ce
https://doi.org/10.1002/ejoc.201201249
https://doi.org/10.1002/ejoc.201201249
Autor:
Knud J. Jensen, Már Másson, Vivek S. Gaware, Sigríður Jónsdóttir, Ögmundur Vidar Rúnarsson, Berglind Eva Benediktsdóttir
Publikováno v:
Carbohydrate Polymers. 86:1451-1460
A highly chemoselective strategy for the synthesis of N,N,N-trimethyl chitosan (TMC) homopolymer and highly substituted N-alkyl-N,N-dimethyl chitosan derivatives was achieved using di-tert-butyldimethylsilyl-3,6-O-chitosan (di-TBDMS chitosan) as a pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::553e2d0ff32520ae32d9624abe0f76b7
https://doi.org/10.1016/j.carbpol.2011.06.007
https://doi.org/10.1016/j.carbpol.2011.06.007
Autor:
Ögmundur Vidar Rúnarsson, Tapio Nevalainen, Clemens Malainer, Hákon Steinsson, Martha Á. Hjálmarsdóttir, Jukka Holappa, Már Másson
Publikováno v:
European Polymer Journal. 46:1251-1267
Quaternary N -(2-( N , N , N -tri-alkyl ammoniumyl and 2-pyridiniumyl) acetyl) derivatives of chitosan polymer, chitooligomer, and glucosamine (monomer) were synthesized for the purpose of investigating the structure activity relationship (SAR) for t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c35c50d1e74b47b3485792d04f09e26e
https://doi.org/10.1016/j.eurpolymj.2010.03.001
https://doi.org/10.1016/j.eurpolymj.2010.03.001
Publikováno v:
Carbohydrate Polymers. 81:140-144
Chitosan has been greatly applied in the fields of biomedicine, biomembranes and food/nutrition because of its nontoxic and biocompatible properties. However, water solubility of chitosan at pH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a56e4c23e9212e96ff27036f63321ed
https://doi.org/10.1016/j.carbpol.2010.01.041
https://doi.org/10.1016/j.carbpol.2010.01.041
Publikováno v:
Carbohydrate Polymers. 74:740-744
Trimethylated chitosan (TMC) is a well-studied N-quaternary chitosan derivative that is promising for various pharmaceutical applications. The most commonly-used procedure today to obtain these derivatives is based on the reaction with methyl iodide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b13b451276ea1f14fb15e302dac3871d
https://doi.org/10.1016/j.carbpol.2008.03.008
https://doi.org/10.1016/j.carbpol.2008.03.008
Autor:
Jukka Holappa, Martha Á. Hjálmarsdóttir, Ögmundur Vidar Rúnarsson, Tomi Järvinen, Tapio Nevalainen, Már Másson
Publikováno v:
Carbohydrate Polymers. 74:566-571
Well characterized methylpiperazine, mono-quaternary dimethylpiperazine and di-quaternary trimethylpiperazine derivatives of chitosan, with different degrees of substitution, were investigated for antibacterial activity against five strains of Gram-p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bb7fe91e2bfe17eb5cedd2ec7dcd19f
https://doi.org/10.1016/j.carbpol.2008.04.010
https://doi.org/10.1016/j.carbpol.2008.04.010
Autor:
Tapio Nevalainen, Már Másson, Jón M. Einarsson, Margrét Valdimarsdóttir, Sigridur Jonsdottir, Ögmundur Vidar Rúnarsson, Martha Á. Hjálmarsdóttir, Thorsteinn Loftsson, Tomi Järvinen, Jukka Holappa
Publikováno v:
European Polymer Journal. 43:2660-2671
The purpose of this study was to synthesize series of methylated chitosaccharide derivatives, possessing various degree of methylation, and to determine their structure activity relationship (SAR) with regard to their antibacterial effect against Sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4f1f197619fc60d3c7f83cceb2f5d0b
https://doi.org/10.1016/j.eurpolymj.2007.03.046
https://doi.org/10.1016/j.eurpolymj.2007.03.046
Autor:
Ögmundur Vidar Rúnarsson, Kenneth Wärnmark, Erhad Ascic, Josep Artacho Ruiz, Michael Harmata, Victor Snieckus, Kari Rissanen, Niels Johan Christensen, Peter Fristrup, Arne Lützen, Christian Benkhäuser
Publikováno v:
The Journal of organic chemistry. 80(16)
The first reported twisted bis-lactam, a racemic Tröger's base (TB) analogue (2), was resolved into its enantiomers on a chiral stationary phase HPLC column. The absolute configuration of (+)-2 was determined to be (R,R)-2 by comparing experimental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0098238c73a0366628a179d28da5a76
https://pubmed.ncbi.nlm.nih.gov/26244379
https://pubmed.ncbi.nlm.nih.gov/26244379
Autor:
Pasi Soininen, Ögmundur Vidar Rúnarsson, Jukka Holappa, Tomas Asplund, Martha Á. Hjálmarsdóttir, Tomi Järvinen, Tapio Nevalainen, Már Másson
Publikováno v:
Carbohydrate Polymers. 65:114-118
The effect of degree of substitution on the antimicrobial activity of water-soluble quaternary chitosan N-betainates was determined against Escherichia coli and Staphylococcus aureus. Chitosan N-betainates showed low antimicrobial activity in neutral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f0a548cdcb17516dc457fc090a6e55b
https://doi.org/10.1016/j.carbpol.2005.11.041
https://doi.org/10.1016/j.carbpol.2005.11.041
Publikováno v:
Talanta. 64:174-180
Immunosensors and biochemical array detection systems based on electrochemical transducers have many advantages such as low detection limit, fast response, simple design and ease of miniaturization. However, further development of such sensors will d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc0939a75880d9629dac9911385f973d
https://doi.org/10.1016/j.talanta.2004.02.007
https://doi.org/10.1016/j.talanta.2004.02.007